Power-Supply Leds - Lenovo x3250 m6 Installation And Service Manual

Note: When you disconnect the power source from the server, you lose the ability to view the LEDs because
the LEDs are not lit when the power source is removed. Before you disconnect the power source, make
a note of which LEDs are lit, including the LEDs that are lit on the operation information panel and LEDs
inside the server on the system board.
Many errors are first indicated by the lit system-error LED on the operator information panel of the server. If
this LED is lit, one or more LEDs elsewhere in the server might also be lit and can direct you to the source
of the error.
Before you work inside the server to view the LEDs, read the "Safety" on page v and "Handling
static-sensitive devices" on page 88.
If an error occurs or you suspect a system error, do the following:
1. Check the operator information panel on the front of the server. If the system-error LED is lit, it confirms
that an error has occurred.
2. Check the IMM2 event log and the system-error log for information about the error.
3. Look at the system service label inside the cover of the server, which gives an overview of internal
components. This label also usually includes helpful instructions to help you correct the error.
For the locations of the error LEDs, see "System-board LEDs" on page 24.
The following table describes the LEDs on the system board and suggested actions to correct the detected
problems:
• IMM2 heartbeat LED: When the server is connected to power, this LED flashes quickly to indicate that the
IMM2 code is loading. When the loading is completed, the LED stops flashing quickly and then flashes
slowly, which means that the IMM2 if fully operational and you can press the power-control button to
start the server.
If the LED does not begin flashing within 30 seconds after the server is connected to power, do the
following:
1. (Trained technician only) Recover the firmware. See "Recovering the server firmware (UEFI update
failure)" on page 74.
2. (Trained technician only) Replace the system board.
• System-error LED: When the LED is lit, it indicates that the microprocessor VRD and/or power voltage
regulators have failed. Then, you need to ask trained technician to replace the system board.
• CPLD heartbeat LED: If the LED flashes at 1 Hz, it is functioning properly and no action is necessary. If
the LED is not flashing, replace the system board (Trained technician only).

Power-supply LEDs

This section describes the power-supply LEDs on the rear of the server and the suggested actions to
correct the detected problems.
The following minimum configuration is required for the server to start:
• One microprocessor
• One 4 GB DIMM
• Power supply
• Power cord
• Four cooling fans
For the locations of the LEDs and connectors on the rear of the server, see "Rear view" on page 17.
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Lenovo System x3250 M6 Installation and Service Guide